Eh, we can move '\n\n' into the alert header
Eh, we can move '\n\n' into the alert header

This avoids:
1. adding extra \n\n to each alert going forward, each time
2. having a more complicated expression in each alert,
    even when header's not in use

pivotal-cf-experimental/datadog-config-oss,pivotal-cf-experimental/datadog-config-oss